Aluminum Alloy Vacuum Casting Equipment

ABSTRACT

An aluminum alloy vacuum casting equipment is studied in this invention, including High Pressure Reactor Tank. The High Pressure Reactor Tank is equipped with guide inside. The High-pressure Reactor Tank is connected with one end of the Compressed Air Pipe. The other end of Compressed Air Pipe is connected with Booster Jar. First Casting Window and Second Casting Window are sets at top of the High-pressure Reactor Tank. The First Casting Window and Second Casting Window are equipped with First Cylinder at one side. The piston rod of First Cylinder is connected with First Connecting-rod. The First Connecting-rod is connected with the casting window cover. The High Pressure Reactor Tank is equipped with Fixed Guide and Unfixed Guide at the bottom. The High Pressure Reactor Tank is equipped with Moonpool Door. The other end of Door Connecting-rod is connected with High Pressure Reactor Tank. The Moonpool Door is connected with Third Cylinder. The High Pressure Reactor Tank is equipped with Actuated Exhaust Ball Valve at one side. Advantages of this invention: All procedures except for putting/fetch of the filler are fulfilled automated, realizing casting in vacuum, reducing labor greatly, providing a safe and reliable equipment for casting of large thin parts.

FIELD OF THE INVENTION

This invention concerns aluminum alloy production equipment, aluminum alloy vacuum casting equipment used for casting in vacuum.

BACKGROUND OF THE INVENTION

Casting of aluminum alloy working pieces are mainly finished in the tank body. For casting of working pieces using High Pressure Reactor Tank body, the sand-box is lifted onto the trolley. Lay the Unfixed Guide in the High Pressure Reactor Tank down, and open the door manually. Then erect the Unfixed Guide. Push the sand-box trolley into the tank body and position manually at last. Then the casting positioning, casting, boosting, solidifying, exhaust and output of sand-box are all finished manually. Disadvantages of this equipment: Manual operations are necessary due to improper structure, hard and dangerous, high waste castings, especially for casting of large thin parts, there are much pinholes and secondary slag entrapments on the castings, and the qualified rate only reaches about 30%. So, How to avoid pinholes and secondary slag entrapments during casting of working pieces, enhancing casting quality of aluminum alloy working pieces, is one of the key topics in this field. And no tips can be obtained from current reported methods and equipments.

SUMMARY OF THE INVENTION

The purpose of this invention is to provide an aluminum alloy vacuum casting equipment, which adopts step automated operation to reduce labor, eliminate dangerous factors and reduce rejection rate.

To reach above object, the following technology and solution is adopted in this invention: The High Pressure Reactor Tank is equipped with guide inside. The High-pressure Reactor Tank is connected with one end of the Compressed Air Pipe. The other end of Compressed Air Pipe is connected with Booster Jar. The Compressed Air Pipe is equipped with air inlet Actuated Ball Valve. First Casting Window and Second Casting Window are sets at top of the High-pressure Reactor Tank. The First Casting Window and Second Casting Window are equipped with First Cylinder at one side. The piston rod of First Cylinder is connected with First Connecting-rod. The First Connecting-rod is connected with the casting window cover. The High Pressure Reactor Tank is equipped with Fixed Guide and Unfixed Guide at the bottom, and the Unfixed Guide is connected with the cylinder. The High Pressure Reactor Tank is equipped with Moonpool Door at one end which is connected with Door Connecting-rod. The other end of Door Connecting-rod is connected with High Pressure Reactor Tank. The Moonpool Door is connected with Third Cylinder. The High Pressure Reactor Tank is equipped with Actuated Exhaust Ball Valve at one side. The High Pressure Reactor Tank is equipped with First Guard and Second Guard at inner top. The First Guard is connected with First Connecting-rod via coupling, and the Second Guard is connected with Second Connecting-rod via couplings. There are two Unfixed Guides. The lower part of First Unfixed Guide is connected with First Pivot Shaft, which is connected with Fourth Cylinder via connecting rod. The lower part of Second Unfixed Guide is connected with Second Pivot Shaft, which is connected with Fifth Cylinder via connecting rod. The High Pressure Reactor Tank is equipped with Support Rod on the inner wall. High Pressure Reactor Tank is equipped with Vacuum Pressure Gauge, Manual Exhaust Pipe and Automatic Exhaust Pipe on the outer wall.

Advantages of this invention: All procedures except for putting/fetch of the filler are fulfilled automated, realizing casting in vacuum, reducing labor greatly, eliminating various risk factors during production, especially for casting of large thin parts, safe and reliable, ensuring qualified rate about 98%, reducing production cost greatly. Less pressure set up time is necessary for this equipment, ensuring more steady casting. In addition, heat treatment of castings and production of aluminum-magnesium alloy castings subject to oxidation are available.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the structure of this invention.

FIG. 2 shows the structure of High Pressure Reactor Tank as shown in FIG. 1.

FIG. 3 is the overview of FIG. 2.

FIG. 4 is the A-A section view of FIG. 2.

FIG. 5 shows the detail of High Pressure Reactor Tank as shown in FIG. 1, mainly showing the position of casting ladles.

DETAIL DESCRIPTION OF THE INVENTION

This invention is described additionally combining the figures and example of implementation.

The High Pressure Reactor Tank is shown in FIG. 3. The High Pressure Reactor Tank 3 is equipped with guide inside. The High-pressure Reactor Tank (3) is connected with one end of the Compressed Air Pipe (8). The other end of Compressed Air Pipe (8) is connected with Booster Jar (7). The Compressed Air Pipe (8) is equipped with air inlet Actuated Ball Valve (4). First Casting Window (17), Second Casting Window (18), Third casting window (14) and Fourth casting window (43) are sets at top of the High-pressure Reactor Tank (3). The First Casting Window (17) and Second Casting Window (18) are equipped with First Cylinder (16) at one side. The piston rod of First Cylinder (16) is connected with First Connecting-rod (19). The First Connecting-rod (19) is connected with the casting window cover (20). The Third Casting Window (14) and Fourth Casting Window (43) are equipped with Second Cylinder (15) at one side. The piston rod of Second Cylinder (15) is connected with Second Connecting-rod (32). The Second Connecting-rod (32) is connected with the casting window cover (20). The High Pressure Reactor Tank (3) is equipped with Fixed Guide (21) and Unfixed Guide at the bottom, and the Unfixed Guide is connected with the cylinder. The High Pressure Reactor Tank (3) is equipped with Moonpool Door (27) at one end which is connected with Door Connecting-rod (25). The other end of Door Connecting-rod (25) is connected with High Pressure Reactor Tank (3). Door Connecting-rod 25 is an arc curved rod, easy for opening of Moonpool Door 27, ensuring long lifetime. The Moonpool Door (27) is connected with Third Cylinder (26). The High Pressure Reactor Tank (3) is equipped with Actuated Exhaust Ball Valve (5) at one side. The High Pressure Reactor Tank (3) is equipped with First Guard (30) and Second Guard (31) at inner top for opening/closing of casting port and smooth casting free of defection. The First Guard (30) is connected with First Connecting-rod (19) via coupling, and the Second Guard (31) is connected with Second Connecting-rod (32) via couplings. There are two Unfixed Guides in this invention. The lower part of First Unfixed Guide (29) is connected with First Pivot Shaft (39), which is connected with Fourth Cylinder (24) via connecting rod. The lower part of Second Unfixed Guide (22) is connected with Second Pivot Shaft (36), which is connected with Fifth Cylinder (38) via connecting rod. The High Pressure Reactor Tank (3) is equipped with Support Rod (34) on the inner wall. High Pressure Reactor Tank (3) is equipped with Vacuum Pressure Gauge (33), Manual Exhaust Pipe (40) and Automatic Exhaust Pipe (23) on the outer wall. In this invention, the sand-box (28) is lifted onto the electric trolley. The Unfixed Guide in the High Pressure Reactor Tank (3) is laid down by the electric system via the cylinder and connecting rod. Then the Moonpool Door (27) is opened via starting the Third Cylinder 26 Driving Door Connecting-rod 25. Then erect the Unfixed Guide under control of electric signal and via cylinder driving connecting rod, and connect it with the Fixed Guide. Press the button on the console, so that the sand-box is delivered to High Pressure Reactor Tank (3) steadily by the electric trolley along the guide. Then close Moonpool Door (27). Now, start the First Cylinder (16) and Second cylinder (15) to open the casting window via the connecting rod. Put the Filler (45) for filling aluminum-water into the High Pressure Reactor Tank 3 through the four windows and connect with the four casting ladles. The casting ladle (44) is above the gate of sand-box. The casting ladle (44) is connected with Swinging Cylinder (12) for controlling of automatic inclination for casting. Fill the aluminum alloy liquid in the four casting ladles into the casting ladles in the High Pressure Reactor tank manually via the filler, and then take out the Filler (45). The First Cylinder (16) and Second Cylinder (15) will drive the connecting rod to close the casting window. Now, start the vacuum pump to pumping out the air in the High Pressure Reactor Tank (3) quickly to obtain optimum vacuum. Pour the aluminum-water in the Casting Ladle (44) slowly into the sand mold cavity. After vacuum casting, the air inlet Actuated Ball Valve 4 is opened, the compressed air in Booster Jar (7) is filled into the High Pressure Reactor Tank (3) quickly, so that the pressure in the High Pressure Reactor Tank (3) reaches 0.6 Mpa quickly. Now, aluminum-water in the casting mold cavity is solidified under pressure via the port and riser. The castings in this invention is produced in vacuum, so the aluminum parts are compact free of detections such as pinhole, shrinkage hole, dispersed porosity and secondary slag entrapments etc.

After the castings are solidified under pressure, open Actuated Exhaust Ball Valve (5) for exhaust. After pressure inside the High Pressure Reactor Tank decreases to zero, erect the Unfixed Guide, and the sand-box is removed out of the tank body by the electric trolley. In the figure, item 6 is the door, item 13 is the vacuum pump, item 35 is the shaft and item 41 is guard. 

1. An aluminum alloy vacuum casting equipment comprising: a high pressure reactor tank equipped with guide inside; the high-pressure reactor tank (3) is connected with one end of the compressed air pipe (8), the other end of compressed air pipe (8) is connected with booster jar (7); the compressed air pipe (8) is equipped with an air inlet actuated ball valve (4); a first casting window (17) and a second casting window (18) are sets at the top of the high-pressure reactor tank (3)′ the first casting window (17) and second casting window (18) are equipped with a first cylinder (16) at one side; a piston rod of first cylinder (16) is connected with a first connecting-rod (19), the first connecting-rod (19) is connected with the casting window cover; the high pressure reactor tank (3) is equipped with a fixed guide (21) and an unfixed guide at the bottom, and the unfixed guide is connected with the cylinder; the high pressure reactor tank (3) is equipped with moonpool door (27) at one end, which is connected with a door connecting-rod (25), the other end of the door connecting-rod (25) is connected with the high pressure reactor tank (3); the moonpool door (27) is connected with a third cylinder (26); the high pressure reactor tank (3) is equipped with an actuated exhaust ball valve (5) at one side.
 2. The aluminum alloy vacuum casting equipment of claim 1, wherein the high pressure reactor tank (3) is equipped with a first guard (30) and a second guard (31) at inner top, the first guard (30) is connected with the first connecting-rod (19) via a coupling, and the second guard (31) is connected with a second connecting-rod (32) via a couplings.
 3. The aluminum alloy vacuum casting equipment of claim 1, wherein there are two unfixed guides, the lower part of the first unfixed guide (29) is connected with a first pivot shaft (39), which is connected with a fourth cylinder (24) via a connecting rod, the lower part of the second unfixed guide (22) is connected with a second pivot shaft (36), which is connected with a fifth cylinder (38) via a connecting rod.
 4. The aluminum alloy vacuum casting equipment of claim 1, wherein the high pressure reactor tank (3) is equipped with a support rod (34) on the inner wall.
 5. The aluminum alloy vacuum casting equipment as described in claim 4, wherein the high pressure reactor tank (3) is equipped with a vacuum pressure gauge (33), a manual exhaust pipe (40) and an automatic exhaust pipe (23) on the outer wall.
 6. The aluminum alloy vacuum casting equipment of claim 2, wherein the high pressure reactor tank (3) is equipped with a support rod (34) on the inner wall.
 7. The aluminum alloy vacuum casting equipment of claim 3, wherein the high pressure reactor tank (3) is equipped with a support rod (34) on the inner wall.
 8. The aluminum alloy vacuum casting equipment as described in claim 6, wherein the high pressure reactor tank (3) is equipped with a vacuum pressure gauge (33), a manual exhaust pipe (40) and an automatic exhaust pipe (23) on the outer wall.
 9. The aluminum alloy vacuum casting equipment as described in claim 7, wherein the high pressure reactor tank (3) is equipped with a vacuum pressure gauge (33), a manual exhaust pipe (40) and an automatic exhaust pipe (23) on the outer wall. 